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J. H. ALKEP..

DIE FOR PORMING GOUPLING PI'NXS.

110.245,691. Patented Aug. 16,1881.

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i UNITED STATES PATENT OFFICEQ JOHN H. ALKER, OF PITTSBURG,PENNSYLVANIA, A SSIGNOR TO JONES St LAUGHLINS, OF SAME PLACE.

DIE FOR FORMING COUPLING-PINS.

SPECIFICATION forming' part of Letters Patent No. 245,691, dated August16, 1881.

Application led May14, 1881.

To all whom t may concern:

Be it known that I, JOHN H. ALKER, of Pittsburg, county ot' Allegheny,State of Pennsylvania, have invented or discovered a new and usefulImprovement in Dies for Shaping and Forming the Heads and Shoulders ofCoupling-Pins; and I do hereby declare the following to be a full,clear, concise, and exact description thereof, reference being had tothe accompanying drawings, making a part of this specification, inwhich-like letters indicating like parts- Figure lis a view, inperspective, of my im- I proved dies for forming a shoulder and head oncouplingpin blanks. Figs. 2 and 3 show sectional elevations of the diesand blank in different positions of working 5 and Figs. 4. and 5 showdierent forms of blanks, illustrative of the work performed by myimproved dies, Figs. 6 and 7 showing cross-sections of the blanks inFigs. 4 and 5 respectively.

My present invention relates to dies for upsetting the ends ofcoupling-pin blanks and forming thereon an enlarged shoulder, a, andhead a', as illustrated in Figs. at and 5. In forming such shoulder andhead I make use of two griping-dies, B B', in the adjacent faces otwhich are formed the parts b b of a gripingcavity. At the rear edge, d,or toward the point end of the blank, this cavity b conforms in size andshape to theblank A. Toward the opposite edge, d', or the edge towardthe end of the blank to be upset, the griping-cavity is widened orenlarged, so that part or all of the walls of the cavity inclineawaytrom the blank when lirst griped, or before the latteris upset,thereby affording space between the gripingdies, within which the stemof the blank below the shoulder is upset or enlarged, as at a2. If thebody or stem of the pin or blank be Hattened or oval in form incross-section, the walls of cavity b are, by preference, inclined from dto d on the edges only or principally, so that the enlargement of thepin at a2 is principally in the direction of its edges, as in Fig. 4;but if round pins are required, the taper from d to d maybe uniform onall sides of the cavity, giving a uniform enlargement in size, as at a2,Fig. 5. The advantages secured in both cases (No model.)

are substantial'y the same-that is, the pin is strengthened and betteradapted to iilltheupper hole in the draw-bar head ofthe car, and also bythe upsetting ot' the metal within the gripingdies, as described, theblank is more easily prevented from yielding between such dies duringthe final and heaviest compresf sion impart-ed in the operation offorming the head and shoulder. These dies B B also serve as an anvilagainst which the Linder or ilat face of" the shoulder a is pressed andformed. They should therefore be strong and well secured. One die, B, issecured in place, by preference, upon a horizontaltable or bed, and theother die, B', is moved horizontally toward and from die B, and for thispurpose it may be mounted in and operated by any suitable or well-knownmechanism adapted to bring such die against and hold it upon theinterposed blank A, as in Fig. 1, with therequired power. Several formsof such mechanism are in common use, and need not be described indetail.

In combination with the griping-dies B B', I make use of a solidupsetting-die (l, in the end orhead of which is formed a sunken cavity,c, having depth and form adapted to produce the desired head a', whichform corresponds approximately to that of the stem ot' the blankthat is,in oval pins, like Fig. 4, the head a retains substantially the sameflattened or oval form in cross-section as the stem, and its width andlength are such as to permit punching or otherwise forming a holetherein in the usual mannerfor convenience of attach ment and handling.In round pins the cavity c is shaped with reference to forming a headround in cross-section and having a length somewhat in excess of itsdiameter, as at a',

diesBB,itand may beoperated byany suitable or well-known power devices,which are adjusted and arranged to carry the working-face of this dieagainst the adjacent edges d ofdies B B', when the lat-ter are gripedupon the blank. In so doing the end ofthe properly-heated blank iscaused to enter cavity c, and bearing or abutting against the bottom cis upset, filling the cavity or space between the griping-dies andproducing the enlargement a2, as stated 5 also, the metal is upsetwithin and lls cavity c in die C, forming the head a and shoulder a, thelatter being given a dat under face by the edges of dies B B', and arounded upper face by the countersink e.

By methods of manufacture heretofore prac,- ticed, considerable skillwas necessary to e11- able the Workman to produce a good shoulder andhead on a pin-blank of either ovalor round form 5 but with dies made andoperated as above described such Work can be done by unskilled or cheaplaborers with rapidity and with great uniformity and perfectness offinish, and in these respects myimproved dies are an improvement in theart of making couplingpins,and lessen considerably the costofmanufacture. Y

I claim herein as my inventionrIhe griping-dies B B', havinggriping-cavities b therein, which increase in width or size toward theend of the blank to be upset, in combination with the upsetting andshaping die C, having sunken cavity o in its workingface withcountersink c at the rim or mouth of such cavity, such dies beingadapted,substan tially as described, to upset and shape a shoulder, a,head a', and enlargement a? on a couplin g-pin.

In testimony whereof I have hereunto set my hand.

JOHN H. ALKER. Witnesses:

R. H. WHlT'rLEsEY, C. L. PARKER.

